There is 2 way to put the panel on your roof.

If you know the structure, mounting and parts, plan it, draw it, buy the parts yourself. Get a Indonesia general worker (construction) and told them what to do. generally, you're the supervisor.

Another way is, contact some solar panel installer. Some might help with the fee.

Or DIY. I install the panel myself. But small qty la.

Saw the Astro solar panel power generation dashboard, quite impressive.

Update on my solar power planning.
I'm going to install 28panels separated into 2 systems.
20 panel 5KW system with inverter and battery for airconds (1.5hp + 1hp) at home. Mining servers will run at morning to burn away extra electric generated. Inverter will switch to TNB when battery runs out at night.

8 panel 2KW system (panel only) for experimental works.

Probably gonna spend rm30k on this...

This post has been edited by yushin: Mar 14 2019, 11:57 AM

What is the battery bank capacity and DC volt?

48V150AH for now.
Will add more later after some observation.

This post has been edited by yushin: Mar 14 2019, 02:05 PM

mind to share which company you engage and how much the cost? am looking for 4KW or 5KW for my house too but not sure which company to engage.
china brand panels/inverters or established brands. so difficult to decide.
PM me please. thanks!

That is not much capacity. 150ah can supply about 2.8kw. Before switch over to TNB.

If use for aircon, 1.5+1hp=2.5hp or about 2kw total, the battery only can supply 1.5hr. The inverter going to be very expensive.

Require 4 battery(150ah) in series. Maybe cost 4.4k just battery. (maybe supplier get cheaper)

Given the panel 5kw generate about 15kw/day (75% efficiency), your battery can charge up in the morning.

The rest dump to mining? But that require some switching over device. If not, the battery won't charge as the mining will eat up the whole supply.

Abit confuse the system run.

This post has been edited by ozak: Mar 14 2019, 04:24 PM

The installer did say the inverter got 2 processors.
It will distribute 60% to the server and 35% to the battery. 5% consider as loss. The power/charge ratio can be configured with computer.
Hmm... very advance.

The inverter is connected to TNB, battery reach low level straight TNB take over.

The panel is Panasonic brand.

The installer has experience installing solar system for bitcoin miners so he understands my requirement.

The inverter is a charge/inverter. Not new. It is a hybrid inverter for another name.

But for charging while supply, than I not sure about it. If it can control percentage distribution, than good la.

Panasonic panel ? Nice.

How much perpanel 250W ? If price good, might tumpang you get few for me.

I will ask the installer when he come site visit my house.
The Panasonic panel has 53v open circuit and powered voltage of 44v.
Very different from the usual china solar panels so your mppt charger need to get the correct one.

Wah, so high the voltage.

It main for 48V run I guess.

No problem for me. I have a MPPT charger which whatever rubbish voltage also can go in. Than can choose 12v or 24v out.

well, the inverter I use will take 450v solar panel input. More efficient to direct convert to 230v output during the day.
wiring also cheaper because no need thick wire to transfer high amp.

2000w = 45v x 44.4A
2000w = 450v x 4.4A

Big difference on wire thickness.

This post has been edited by yushin: Mar 14 2019, 09:20 PM

Yup. Can size the wire smaller. Also the inverter work more efficiency to convert without large different voltage.

But becarefull with high DC voltage. Take precaution when DIY.

My MPPT max is only 150V. I don't feel safe with this high DC.

Thats why I let him install full set for the 5kw system.
the 2kw system I probably will run in 45v config. Maybe I should just put 1kw enough...hmmm
2000w on wires just for experimenting feels scary.

The 250w panasonic panel costs rm680 if you buy out of package.

I was chatting with the installer, they also do FIT...
But the administrative costs for the net metering meter, agreement, permit, inspection etc already costs 7k.
rm8k I can get 48v300AH battery already...

This post has been edited by yushin: Mar 14 2019, 10:06 PM

2000w is not scary. As long as not 2000VDC.

Makesure the wire size is right.

DC voltage configuration normally is 12v, 24v and 48v. If running alot of high watt thing, than use 48v.

I choose 24v cause have many gadget on 24v. And easy to get thing and converter on 24v or 12v.

You mean the panel not buy from him would cost RM680? 2.72/watt.

Why not get the FIT. Better ROI.

I mean if you buy the panel without package from him, it will costs RM680.
I prefer to have all the power to myself.

He said the new FIT buyback is at 0.57. Not worth liao.

This post has been edited by yushin: Mar 14 2019, 10:37 PM

Oh. thanks.

What you think the panel price? Can buy?

Power exchange for money ma. Not freely give to TNB also.

If you dont need to squeeze till the last drop of power from limited roof space with sunlight, there are many cheaper less efficient china panels that are half the price of panasonic panels.

looking at taobao
250w poly panel costs rm280 excluding transport.

from what I see, panasonic panel has these benefits
1) Smaller size yet still high power. I don't have a big roof space that has plenty of sunshine.
2) Temperature coefficient of -0.29% aka more heat resistance. You know lar Malaysia damn hot.
3) More tolerent on sunshine angles. You will get more power generation time per day. Can't remember where I read this already.
4) 25 year warranty on the panel power generation until 90%.

Btw, why the solar panels on lazada so expensive?

I have follow Panasonic panel for many yrs. It original from Sanyo panel which buy over by Panasonic.

It is most efficient back than. Famous with the HIT model. Not sure the rank now. But price also expensive.

Not sure what is the price now. 680k look ok to me.

I m skeptical with the china don't no what panel. Those spec also too good to be true. I have 180w total panel from china and with few yrs running now, the output look like dropping. 1 of the panel bus bar strip corroded. I haven't dismantle out and check will it still function or not.

I think those panel sell online are subject to tax and courier fee. What I know is the courier fee is not cheap as the panel size and weight is consider large package.

When will you order the panel and package? Let me now. Probably 3-4panel tumpang you.

Do you have the model and size ? Forget that I need to check the roof size. House too small.

Panel size 1580x812x35mm